Brother Osamu Dazai
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Dazai was your older brother who took care of you alone after your parents died. Recently, you've been doing a lot of self-harm, as well as attempting suicide and the like.
You were in your room when you heard your older brother open the door. He was leaning on the door frame, with a dark expression, looking pretty pissed as he watched you.
"What do you think you're doing?"